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datastore.go
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datastore.go
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// Copyright (c) 2015 Stuart Glenn
// All rights reserved
// Use of this source code is goverened by a BSD 3-clause license,
// see included LICENSE file for details
// Datastore for perstiance of access rules, clients & keys
package atm
import (
"database/sql"
"errors"
"fmt"
"time"
)
type NonceStore struct {
nonces *ExpiringCache
}
func NewNonceStore() NonceStore {
return NonceStore{nonces: NewExpiringCache(5 * time.Minute)}
}
func (d NonceStore) Add(n string) {
d.nonces.Set(n, "", 10*time.Minute)
}
func (d NonceStore) Valid(n string) bool {
_, found := d.nonces.Get(n)
return !found
}
type Datastore struct {
pool *sql.DB
signingKeys *Cache
}
type Account struct {
Id string `json:id`
Name string `json:name`
}
func NewDatastore(driver, dsn string) (*Datastore, error) {
ds := &Datastore{}
var err error
ds.pool, err = sql.Open(driver, dsn)
if nil != err {
return nil, err
}
err = ds.Ping()
if nil != err {
return nil, err
}
ds.signingKeys = NewCache()
return ds, nil
}
func (d *Datastore) Ping() error {
return d.pool.Ping()
}
func (d *Datastore) Close() error {
return d.pool.Close()
}
func (d *Datastore) RemoveSigningKeyForAccount(account string) {
d.signingKeys.Delete(account)
}
func (d *Datastore) AddSigningKeyForAccount(key, account string) {
d.signingKeys.Set(account, key)
}
func (d *Datastore) signingKeyFor(account string) string {
if k, found := d.signingKeys.Get(account); found {
return k.(string)
}
return ""
}
func (d *Datastore) Account(name string) (*Account, error) {
a := &Account{}
stmt, err := d.pool.Prepare("SELECT id, name from accounts where name = ?")
if nil != err {
return a, err
}
defer stmt.Close()
rows, err := stmt.Query(name)
if nil != err {
return a, err
}
defer rows.Close()
numRows := 0
for rows.Next() {
if numRows > 1 {
return a, errors.New("Too many results")
}
err := rows.Scan(&a.Id, &a.Name)
if nil != err {
return a, err
}
err = rows.Err()
if nil != err {
return a, err
}
numRows++
}
return a, nil
}
func (d *Datastore) KeyForRequest(u *UrlRequest, appId string) (string, int64, error) {
var signing_key string
var duration int64
stmt, err := d.pool.Prepare("SELECT a.id, r.duration as duration from accounts a, rules r " +
"WHERE r.account_id=a.id AND requestor_id = ? AND a.name = ? AND " +
"? REGEXP r.container AND ? REGEXP r.object AND r.method = ?")
if nil != err {
return signing_key, duration, err
}
defer stmt.Close()
rows, err := stmt.Query(appId, u.Account, u.Container, u.Object, u.Method)
if nil != err {
return signing_key, duration, err
}
defer rows.Close()
numRows := 0
var grantingAccountId string
for rows.Next() {
//if numRows > 1 {
//return signing_key, duration, errors.New("Too many results")
//}
err := rows.Scan(&grantingAccountId, &duration)
if nil != err {
return signing_key, duration, err
}
err = rows.Err()
if nil != err {
return signing_key, duration, err
}
numRows++
}
if 0 == numRows {
return "", 0, nil
}
signing_key = d.signingKeyFor(grantingAccountId)
if "" == signing_key {
return signing_key, 0, errors.New(fmt.Sprintf("Key not set for %s", u.Account))
}
return signing_key, duration, nil
}
func (d *Datastore) ApiKeySecret(apiKey string) (string, error) {
var secret string
stmt, err := d.pool.Prepare("SELECT secret from accounts where id = ?")
if nil != err {
return secret, err
}
defer stmt.Close()
rows, err := stmt.Query(apiKey)
if nil != err {
return secret, err
}
defer rows.Close()
numRows := 0
for rows.Next() {
if numRows > 1 {
return secret, errors.New("Too many results")
}
err := rows.Scan(&secret)
if nil != err {
return "", err
}
err = rows.Err()
if nil != err {
return "", err
}
numRows++
}
if 0 == numRows || "" == secret {
return "", errors.New(fmt.Sprintf("No secret key for api: %s", apiKey))
}
return secret, nil
}